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Factors Affecting Germination and Emergence of Dame's Rocket (Hesperis matronalis)

Published online by Cambridge University Press:  20 January 2017

David J. Susko  and
Yara Hussein
David J. Susko*
Affiliation:
Department of Natural Sciences, University of Michigan–Dearborn, Dearborn, MI, USA 48128
Yara Hussein
Affiliation:
Department of Natural Sciences, University of Michigan–Dearborn, Dearborn, MI, USA 48128
*
Corresponding author's E-mail: [email protected]
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Abstract

Laboratory experiments were conducted to determine the effects of temperature, light, cold stratification, dry storage, solution pH, solution osmotic potential, and planting depth on germination and emergence of dame's rocket. Maximal germination (> 80%) of fresh seeds occurred at alternating temperatures ≥ 25/15 C in both alternating light/dark and continuous darkness. However, < 10% of seeds germinated at or below 20/10 C, with lower germination in the presence of light than in darkness. Cold stratification at 4 C for 4 to 16 wk enhanced germination at low alternating temperatures (≤ 20/10 C), but depressed germination at warm temperature regimes (≥ 25/15 C). After 1 yr of dry storage (after-ripening), germination exceeded 94% and did not differ significantly among temperature regimes. Germination exceeded 60% in solutions with pH 3 to 10. Germination was reduced below 50% in solutions with osmotic potentials below −0.6 MPa. Percent emergence was greater than 56% at burial depths in soil of 0 to 5 cm, with maximal emergence (93 to 99%) at 0 to 2 cm. Dame's rocket seeds possess non-deep physiological dormancy at maturity, but when dormancy is alleviated, the seeds are capable of germinating in a variety of climatic and edaphic conditions.

Keywords

Dame's rocketHesperis matronalis L. HEVMALighttemperaturecold stratificationpHosmotic stressplanting depth
Type
Weed Biology and Ecology
Information
Weed Science , Volume 56 , Issue 3 , June 2008 , pp. 389 - 393
Copyright
Copyright © Weed Science Society of America 

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